[bug#56367] [PATCH] gnu: curl: Fix build on powerpc64le-linux

[Thiago Jung Bauermann via Guix-patches via <guix-patches@gnu.org>]

* gnu/packages/patches/curl-include-sched-h.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/curl.scm (curl)[source]<patches>: New field.
---

Hello,

On powerpc64le-linux, “guix pull” is broken because the curl build fails
with:

--8<---------------cut here---------------start------------->8---
In file included from easy.c:89:
easy_lock.h: In function ‘curl_simple_lock_lock’:
easy_lock.h:56:7: error: implicit declaration of function ‘sched_yield’ [-Werror=implicit-function-declaration]
   56 |       sched_yield();
      |       ^~~~~~~~~~~
--8<---------------cut here---------------end--------------->8---

So backport the upstream commit that fixed it.

 gnu/local.mk                                  |  1 +
 gnu/packages/curl.scm                         |  3 +-
 .../patches/curl-include-sched-h.patch        | 29 +++++++++++++++++++
 3 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100644 gnu/packages/patches/curl-include-sched-h.patch

diff --git a/gnu/local.mk b/gnu/local.mk
index 3a56ad371dd0..98704d8f2a89 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -977,6 +977,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/crda-optional-gcrypt.patch		\
   %D%/packages/patches/clucene-contribs-lib.patch               \
   %D%/packages/patches/cube-nocheck.patch			\
+  %D%/packages/patches/curl-include-sched-h.patch		\
   %D%/packages/patches/curl-use-ssl-cert-env.patch		\
   %D%/packages/patches/cursynth-wave-rand.patch			\
   %D%/packages/patches/cvs-CVE-2017-12836.patch		\
diff --git a/gnu/packages/curl.scm b/gnu/packages/curl.scm
index ebc36eead2a5..20c2159299d3 100644
--- a/gnu/packages/curl.scm
+++ b/gnu/packages/curl.scm
@@ -153,7 +153,8 @@ (define curl-7.84.0
                                   version ".tar.xz"))
               (sha256
                (base32
-                "1f2xgj0wvys9xw50h7vcbaraavjr9rxx9n06x2xfbgs7ym1qn49d"))))
+                "1f2xgj0wvys9xw50h7vcbaraavjr9rxx9n06x2xfbgs7ym1qn49d"))
+              (patches (search-patches "curl-include-sched-h.patch"))))
     (arguments (substitute-keyword-arguments (package-arguments curl)
                  ((#:phases phases)
                   (cond
diff --git a/gnu/packages/patches/curl-include-sched-h.patch b/gnu/packages/patches/curl-include-sched-h.patch
new file mode 100644
index 000000000000..7ea794c016f0
--- /dev/null
+++ b/gnu/packages/patches/curl-include-sched-h.patch
@@ -0,0 +1,29 @@
+From e2e7f54b7bea521fa8373095d0f43261a720cda0 Mon Sep 17 00:00:00 2001
+From: Daniel Stenberg <daniel@haxx.se>
+Date: Mon, 27 Jun 2022 08:46:21 +0200
+Subject: [PATCH] easy_lock.h: include sched.h if available to fix build
+
+Patched-by: Harry Sintonen
+
+Closes #9054
+---
+ lib/easy_lock.h | 3 +++
+ 1 file changed, 3 insertions(+)
+
+This patch is taken from curl's master branch to fix a build failure on
+powerpc64le-linux. See https://github.com/curl/curl/issues/9071
+
+diff --git a/lib/easy_lock.h b/lib/easy_lock.h
+index 819f50ce815b..1f54289ceb2d 100644
+--- a/lib/easy_lock.h
++++ b/lib/easy_lock.h
+@@ -36,6 +36,9 @@
+ 
+ #elif defined (HAVE_ATOMIC)
+ #include <stdatomic.h>
++#if defined(HAVE_SCHED_YIELD)
++#include <sched.h>
++#endif
+ 
+ #define curl_simple_lock atomic_bool
+ #define CURL_SIMPLE_LOCK_INIT false

base-commit: cec5a522e190447e64a0a0f193bccc67b7095c31